T-Mobile USA has announced an expansion of its popular Unlimited Nationwide 4G Data plan. It will be available with no annual contract starting today, Jan. 9. Here's more info on this new non-contract plan:

Consumers today are demanding more choice and flexibility in how they purchase wireless, along with the freedom to take advantage of everything their 4G smartphone has to offer without having to keep track of their data usage. Since its introduction in September, T-Mobile's Unlimited Nationwide 4G Data plan is by far the most popular plan choice among T-Mobile customers. In fact, nearly half (46 percent) of new customers opted for the new data plan in December 2012.

Wireless data usage on T-Mobile's nationwide 4G network continues to grow as consumers increasingly step up to a fast and unlimited experience on the latest 4G devices. In total, T-Mobile customers stream 32 million songs and visit Facebook 1.8 billion times per day. T-Mobile's Unlimited Nationwide 4G Data plan helps these customers power a variety of 4G experiences -- from on-the-go gaming to streaming music and video -- all without limits on its 4G network.

Beginning Jan. 9, T-Mobile's Unlimited Nationwide 4G Data plan will be available with no annual contract for $70 per month online at www.t-mobile.com, at T-Mobile retail stores or through select dealers and national retail stores.

To kick off the Unlimited Nationwide 4G Data plan with no annual contract, T-Mobile will have a new offer on one of its latest smartphones. Starting Jan. 9, the LG Optimus L9 will be available for $199.99 with no annual contract. Featuring a stylish design and a stunning 4.5-inch qHD touch screen, the Optimus L9 on T-Mobile's nationwide 4G data network delivers amazing 4G experiences, including streaming movies, searching the Web, online gaming and more.